<template>
  <section class="msite">
    <!-- 导航头 -->
    <HeaderTop :title="address.name">
      <span class="header_search"
            slot="search">
        <i class="iconfont icon-sousuo"></i>
      </span>
      <span class="header_login"
            slot="login">
        <!-- 通过userInfo判断是否登录，根据是否登录显示用户信息 -->
        <span class="header_login_text"
              :to="userInfo._id ? '/userInfo' : '/login'"
              v-if="!userInfo._id">登录/注册</span>
        <span class="header_login_text"
              v-else>
          <i class="iconfont icon-person"></i>
        </span>
      </span>
    </HeaderTop>
    <!--首页导航-->
    <nav class="msite_nav">
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide"
               v-for="(types, index) in typesArr"
               :key="index">
            <a href="javascript:"
               class="link_to_food"
               v-for="(type, index) in types"
               :key="index">
              <div class="food_container">
                <img :src="baseImageUrl+type.image_url">
              </div>
              <span>{{type.title}}</span>
            </a>
          </div>
        </div>
        <!-- Add Pagination -->
        <div class="swiper-pagination"></div>
      </div>
    </nav>
    <!--首页附近商家-->
    <div class="msite_shop_list">
      <div class="shop_header">
        <i class="iconfont icon-xuanxiang"></i>
        <span class="shop_header_title">附近商家</span>
      </div>
      <ShopList></ShopList>
    </div>
  </section>
</template>

<script>
import { test } from '../../api/index.js'

import { mapState } from 'vuex'
import Swiper from 'swiper'
// 新版本swiper样式引入
import 'swiper/swiper-bundle.css'
import HeaderTop from '../../components/HeaderTop/HeaderTop.vue'
import ShopList from '../../components/ShopList/ShopList.vue'
export default {
  components: { HeaderTop, ShopList },
  data () {
    return {
      baseImageUrl: 'https://fuss10.elemecdn.com'
    }
  },
  mounted () {
    test()
    // 发送请求获取食品分类
    this.$store.dispatch('getTypes')
  },
  computed: {
    ...mapState(['address', 'types', 'userInfo']),
    // 将types分为一个二维数组，便于数据引入
    typesArr () {
      const { types } = this
      const Arr = []
      let minArr = []
      types.forEach(type => {
        // 如果小数组长度为8，将元素放入数组并呈现-----一页的分类数为8个
        if (minArr.length === 8) {
          minArr = []
        }
        // 如果小数组为空，将大数组与小数组进行关联
        if (minArr.length === 0) {
          Arr.push(minArr)
        }
        minArr.push(type)
      })
      return Arr
    }
  },
  watch: {
    types (value) {
      this.$nextTick(() => {
        // 创建一个swiper实例
        // eslint-disable-next-line no-new
        new Swiper('.swiper-container', {
          loop: true, // 可以循环轮播
          // 如果需要分页器
          pagination: {
            el: '.swiper-pagination'
          }
        })
      })
    }
  }

}
</script>
<style lang="stylus" rel="stylesheet/stylus">
@import '../../common/stylus/mixins.styl'
.msite // 首页
  width 100%
  .msite_nav
    bottom-border-1px(#e4e4e4)
    margin-top 45px
    height 200px
    background #fff
    .swiper-container
      width 100%
      height 100%
      .swiper-wrapper
        width 100%
        height 100%
        .swiper-slide
          display flex
          justify-content center
          align-items flex-start
          flex-wrap wrap
          .link_to_food
            width 25%
            .food_container
              display block
              width 100%
              text-align center
              padding-bottom 10px
              font-size 0
              img
                display inline-block
                width 50px
                height 50px
            span
              display block
              width 100%
              text-align center
              font-size 13px
              color #666
      .swiper-pagination
        >span.swiper-pagination-bullet-active
          background #02a774
  .msite_shop_list
    top-border-1px(#e4e4e4)
    margin-top 10px
    background #fff
    .shop_header
      padding 10px 10px 0
      .shop_icon
        margin-left 5px
        color #999
      .shop_header_title
        color #999
        font-size 14px
        line-height 20px
</style>
